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Патент USA US2105922

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Jan. 18, 1938.
E. H. MALTBY
2,105,922
CONVEYER
Filed Nov. 26, 1934
4 Sheets-Sheet 1
15rd floor
Edward HMQZ@
Jan. 18, 1938.
E. H. MAL’TBY
2,105,922
CONVEYER
, Filed NOV. 26, 1934
‘
4 Sheets-Sheet 2
Jan._18, 1938.
E. H.‘ MALTBY
2,105,922
CONVEYER
Filed Nov. 26, I934
.
4 Sheets-Sheet 3
Jan. 18, 1938.
E. H. MALTBY
2,105,922 '
CONVEYER
Filed Nov. 26, 1934
4 Sheets-Sheet 4
03000000 J‘ |
0
Patented Jan. 18, 1938
2,105,922
UNi'i‘ED stares earner series
2,105,922
CONVEYER
Edward H. Maltby, White Bear Lake, Minn” as
signor to Standard Conveyor Company, a cor
poration of Minnesota.
Application November 26, 1934, Serial No. 754,721
14 Claims. (Cl. 193-36)
the movable guide rails and actuating mecha
plurality of vertically spaced convolutions, it is nism;
In connection with spiral conveyors having a
frequently desirable to take off or divert the loads
or feed them to the main conveyer at one or
O
more points intermediate the ends of the main
conveyer. The switch devices heretofore provided
have been cumbersome, relatively di?icult to op
erate and have occupied such space that they
are unsuited for use with a spiral conveyer where
10 the available space is small, as in cases where
the pitch or vertical spacing of the convolutions
is of relatively small size.
It is an object of the present invention to pro-
Fig. 5 is a side elevation illustrating the switch
in detail with the supporting and guiding mech
en
anism for the several rollers;
Fig. 6 is an isometric-bottom view illustrating
a pair of the roller assemblies and their guiding
arms;
Fig. 7 is a similar view of one of the rollers and
arm, as seen from the top;
10
Fig. 8 is a plan view showing my improved
switch in connection with a straight main con
veyer and a pair of branch or intersecting con
vide a compact, smoothly operating section of
15 a spiral conveyer which may be quickly and
easily moved laterally to switch loads to or from
veyers;
Fig. 9 is a plan View of a supporting plate for 15'
the switch rollers;
a branch conveyer, chute or place of deposit
Fig. 10 is a plan view of one of the frame mem
for the load.
‘ bars with perforations for the roller guide pivots,
A particular object is to provide a novel sec- and
20 tion of rollers adapted to constitute a part of a
spiral or curved conveyer and having individual
rollers which are relatively movable to extend
at various angles to each other.
I
Fig- 11 is a Central Vertical Section thI‘OIIgh One 210
of the ball casters for supporting the rollers
Referring to Fig- 1, the numeral l2 indieetes
.
the spiral conveyer down which the loads, usu'
Another object of the invention is to provide
25 novel and ef?cient supporting and guiding means
ally in the form of packages or other containers
of goods, may he Carried from the third floor I3
t0 the ?rst ?oor M. one Of my improved Switches
l5 forms a part Of the main conveyer and is
adapted in One position to divert the leads to a
branch conveyer ll located at a second floor I6.
In the Construction Of the Switch ‘5, shown
‘in detail in Figs. 2 to 11 inclusive, a smooth metal
plate “3 of Size and Shape Suitable to Support a
Series Of conveyer l‘ellel‘s, indicated by the ml
merals l9 to 26 respectively, is mounted on a
Suitable frame to extend Substantially hOIiZOIItelly 01“ at e Slight ihelihe- Extending parallel
t0 and beneath each of the Tellers 59 t0 26 iS a
rigid bar 27 carrying 011 its ends upstanding,
?anged members ‘28 Which Support the axial
§hafts or §tuds 29 upon which the _r°ne1_'s are
3°P¥na1ed m a’ manner Well known In thls art‘
for individually movable rollers in a switch of the
type in which said rollers are adapted to extend
radially to a curve or in parallel relation to each
other to form a straight section,
30
A further object is to provide a switch having
individually movable rollers at the junction of
intersecting conveyers and novel mechanism for
guiding the loads along said rollers to either of
the intersecting conveyers.
35
Other objects are to facilitate the movement
of such a switch and render it more durable by
providing antifriction supports for the rollers and
a novel arrangement of pivoted and intercon-
nected arms adapted to coordinate the movement
40 of the individual rollers and retain them at all
times approximately radially to the curve formed
25'
30
35
40
by the Switch
Rigidly secured to each end of each of the bars
Referring to the accompanying drawings which ‘a’, 1.5 an angle Chp a’vmg 2" downwafrdly pro‘
illustrate the best form of my device at'present
45 known to me.
=
1
to a ?ange 3| on a foot piece 32. Each foot plece 4'5
Figure 1 is’ a diagrammatic muymtion of a
typical Spiral conveyer with my immjm‘fed takpo?
.
.
.
""
.
'
or Switch’ a portion of the 5mm} being broken
Jectmg ?ange 30 whlch .ove?a‘psland 1S secltred
v
32 has mounted on its bottom. a ball caster 33,
preferably constructed as illustrated in Fig. 11,
to
reduce
friction
to a
minimum.
The
caster
illustrated has a relatively large spherical mem
50 away to P1016 clearly_ show the sW1tch;_
_
7mg‘ 2 1S 9' perspecPve ‘new of the Switch’ mam
ber 34 con?ned by a casing which is ?anged in- 50
ward to retain the said member. A multiplicity
splr a1 conveyer and omnch conveyer;
Fig- 3 is at 101811 View Of the Switch and adjacent
portions of the Spiral and branch eehveyers;
55
Fig, 4 is e Side elevation particularly Showing
of relatively small balls 35 are revolubly mounted
between the upper surface of the member 34 and
a concavely spherical seat 36. It will be under
stood that the contacting surfaces of the mem- 55
2
2,105,922
hers 34, 35 and 35 are hard and durable and that
the member 34 is free to rotate in all directions
in use.
To guide the several rollers l9 to 26 in different
arcs on the plate I8, I provide arms 31, 38, 39,
40, 4|, 42, 43 and 44 extending in overlapping
relation to each other and movable in planes
substantially parallel to the plate 48. Projecting
downward from one end of the arm 31 is a piv
10 otal support 45 having a reduced stud or pin 46
?tting in a perforation 41 in the plate i8 and
in a perforation 48 in a plate 49 extending par
allel to the plate l8 (see Figs. 5, 9 and 10). “The
arm 3'! is rigidly secured to the bottom of the
15 bar 21 supporting the roller [9 and extends-at
right angles to said bar. The arms 38 to 44 are
progressively longer than the arm 3'! and each
has a pivotal support similar to the support 145
and is connected to one of the roller supports 21
so as to guide the several rollers in arcs having
radii of different lengths and with centers spaced
longitudinally of the conveyer. Thus the roller
26 is guided by the arm ‘44 of greatestlength and
this arm has'a pivotal support 50 of the smallest
25 dimension vertically and "having bearings in a
perforation v51' (Fig. 9) in the plate 18 and a
20
perforation ‘52 in ‘the plate 49 (Fig. 10). ‘Similar
perforations in the plates l8 and 49 afford :bear
rails above. A stop 55a is provided for the free
end of the rail 55 and a similar stop 56a for the
rail 56. To frictionally retain the section of the
rollers in operative positions, small lugs 65 are
mounted on or formed in the plate [8 and are
so located that a pair of said lugs are adapted to
receive the ball casters supporting the roller 26
between them in each operative position of the
switch. Thus one pair of the lugs 65 frictionally
retains the switch in its curved position and an 10
other pair retains the switch in its straight posi
tion against accidental movement. These lugs
.65sproject only slightly from the face of the plate
l8 so as to permit the ball casters to pass over
them with the desired ease when the switch is
operated.
Another typical use of my invention is shown
in Fig. '8 wherein a main, straight conveyer is in
dicated by the numeral 66 and two branch con
veyers‘by the numerals 61 and 68 respectively. 20
In this arrangement, the supporting plate :69 .for
the'movable section [5 of rollers is substantially
hexagonal in plan and said switch section of
rollers maybemoved from the straight position
illustrated to such curved positions as to connect
with and deliver loads to .or‘from (depending on
the direction of .the slope) either of the branch
conveyers 61 and 68.
ings for "the pivotal supports .forthe arms 38
30 to 43 inclusive, the several pivotal axes ‘being in
‘
30
a common v‘vertical plane. vAs clearly shown .iin
With a curved or spiral main conveyer the
Fig.-5,~the ?anges 3G and ‘3| for‘the several rollers
switch section l5 of rollers may be'normally re
tained‘in a curved position, such ‘as'that shown
in Figs. 2 and 3. The end iroller'26 is held 'in
proper alignment'with the curve by the lugs 65
are of various heights and .overlap‘sul‘?ciently to
give the desired slope to the rollers and to com
pensate for the thickness-‘oflthe arms 31 to '43
inclusive.
Each of the ‘arms 31 to 43.inclusive is provided
near its ‘free end with ‘a downwardly projecting
stud 53 engaging in a slot 54 formed in ‘the
immediately subjacent arm. The slots 54‘are
elongated longitudinally of the :arms to permit
movement of .the several rollersin the required
arcs.
.
As best shown in Figs. 2, 3 and 4,1 provide-guide
45 rails 55 and .56 having a common pivotal support
51 mounted near the junction of the branch con
veyer ‘I1 with the main conveyer l2. The rail
55ais curved to con'iorm‘to the curve of the outer
side of the spiral ‘and the rail 56 is substantially
50 straight to guide the loads from'the spiral in a
straight line ‘along the switch section when’ the
latter is actuated‘to connect with the branch con
veyer I1. "The rails 55 and 56 are rigidly con—
nected together to swing above the switch sec~
55 tion and are rigidly secured to the pivotal sup
port '51 which has bearings in thelplates 18 and
49 at its lower end and a bearing-58 supported
on anangle bar 59 projecting above the conveyer.
Anv oblique brace member 66 connects the upper
60 end of the pivotal support '5'! to the rails 55 and
56 at a point removed from the pivot. To facili
tate actuating these rails ‘from one operativepo
sition to'the other, a lever 6| is'?xed on the
upper end of the pivotal support 51 and is ar
65 ranged tobe actuated by a ?exible cable ‘62. This
cable may be trained over guide pulleys, as in
Fig. 1, where the‘switch section is located at ‘such
elevation that its upper surface is inaccessible to
the operator.
70
‘
Operation '
'
‘To coactwith the movable guide rails 55 and
56, stationary guide rails 63 and-64 are provided,
as indicated in v‘Figs. 2 and 3, these rails being
supported in obvious'manner on the plate l8 and
at such an elevation above the ‘tops of the rollers
75 as to permit the ‘passage of the movable guide
between which the supporting ball‘casters for-said
roller are positioned and theother'rollers I9 to
25 are retained in proper radial positions by the
interengaging studs '53 and slots '54. Travel‘of
the load along the main conveyer is now guided 5
by the :side'rails, including the ‘stationary raili'53
and movable rail 55. When it is desired to take
off or divert loads from the main conveyer to the
branch conveyer H, the free end of the ‘switch
section is moved laterally of the curve to a new 15
position in alignment with the branch’ conveyer
and each of the individually supported rollers
l9 to 26 moves on its own are and radius ‘to the
new position in which the rollers, instead’ of be
ing ‘radial in a curve, are disposed in parallel
relation to each other. To guide the loads to the
branch conveyer over the switch, the lever 6| is
actuated to swing the guide rails ‘55 and 56 to
such position that the latter rail is disposed in
continuation of the side rail of the conveyer‘ll ‘
and in parallel, spaced relation to the stationary
rail 64.
'
'
It will be evident from Fig. 3 that the center
lines of the arms 31 to 44 inclusive are all'tan (it)
gential to the-center line of the curve ‘formed
by the rollers H! to 26 and said arms may be,
within the spirit of this invention, so located as
to be substantially tangentialto any of a num
ber of arcs having a common center with the con‘
veyer curve.
‘
I
Movement of the switch ‘section from one posi
tion .to vthe other is accomplished with ease and
with a minimum of wear by reason of my ar
.
rangement of the anti-friction supports for the
individual rollers and the positive guide for ‘each
roller afforded by the armsl3'! to '44 inclusive with
their freely turning pivots. The connectionsbe
tween the rollers including the studs 53 engaging
in the slots '54 insure the retention of each roller
in its proper, substantially radial, relation to the
2,105,922
curve formed by the entire group. The entire
structure is so compact that it is peculiarly
adapted for use in a spiral conveyer where the
clearance between convolutions is small and
where the bodily substitution of a diverter sec
tion for a section of the main conveyer would be
impossible or impractical. It will be understood,
however, that my invention is not limited in its
use to a spiral conveyer but is adapted for use
10 wherever a movable roller switch is required or
desirable.
Having described my invention, what I claim
as new and desire to protect by Letters Patent is:
1. The combination with a spiral conveyer
having a plurality of vertically spaced convolu
tions, of a switch comprising, a section of in
dividually and laterally movable rollers for sup
porting loads, connected together for movement
in unison and adapted to form a part of said
spiral conveyer in one position and in another
position to form a branch conveyer, a support
3
of their pivots and means connecting‘said radius
arms together for movement in unison, said roll
ers being movable from positions in spaced, sub
stantially parallel relation to eachother to posi—
tions forming a curve with‘ the rollers extendingv
substantially radially to each other.
6. A roller conveyer section comprising, a se
ries of rollers, radius arms of progressively in
creasing lengths severally connected to the suc
cessive rollers of said section and pivotally sup
ported independently of each other, said radius
arms extending longitudinally of the conveyer
and having pivot centers spaced apart along the
conveyer, said rollers being movable under the
guidance of said arms in arcs having different
radii.
'7. In a device of the class described, a plu
rality of rollers, a supporting member extending
longitudinally of each roller, anti-friction casters
for supporting each of said members, a plate af
fording a guiding and supporting surface for said
ing plate extending beneath all of said rollers
casters and radius arms severally connected to
and means for supporting said rollers independ
ently of each other on said plate, said independ
25 ent supports and plate being formed to maintain
the axes of said rollers substantially horizontal
in both of said positions.
said roller-‘supporting members respectively and
2. In a device of the class described, a main
conveyer, a branch conveyer arranged to inter
30 sect said main conveyer and an articulated sec
tion of said main conveyer movable to connect
said main conveyer to said branch conveyer com
prising, a substantially horizontal, supporting
plate, a series of rollers, pairs of legs spacing said
rollers at progressively decreasing heights from
said plate down the conveyer, said rollers and
legs being movable laterally across and parallel
to saidlplate, a series of radius arms severally
connected to said rollers respectively for guiding
40 them upon said plate and means connecting said
rollers together for movement in unison.
3. In a device of the class described, a main
conveyer, a branch conveyer arranged to inter
sect said main conveyer and an articulated sec
45 tion of said main conveyer movable to connect
said main conveyer to said branch conveyer
comprising, a supporting plate, a series of roll
ers, means supporting said rollers for relative
movement upon said plate, a series of radius
50 arms, each rigidly connected to one of said rollers
at one end and extending at right angles thereto
and pivotally supported at the other end on
said plate and means projecting from each of
said arms to slidably engage the adjacent arms
55 whereby said arms are joined together for move—
ment in unison.
ll. In a device of the class described, a main
conveyer, a plurality of branch conveyers ar
ranged to connect with said main conveyer and
60 an articulated section of said main conveyer
movable to connect said main conveyer with
either of said branch conveyers comprising, a
supporting plate, a series of rollers, means sup
porting said rollers for relative movement on
said plate, a series of radius arms, each rigidly
connected to the supporting means for one of
said rollers at one end and having a ?xed pivot
near its other end to swing substantially parallel
to said plate and means operatively connecting
said arms together for movement in unison.
5. A roller conveyer section comprising, a se
ries of rollers, a radius arm secured to each of
said rollers near one end and having a ?xed
pivot near the other end, said radius arms be
ing relatively movable in arcs about the axes
pivoted to swing in substantially parallel relation '
to said plate, the several pivotal axes for said 25
arms being spaced apart longitudinally of the
conveyer and said arms being of unequal length
and progressively longer from one end of the
group of rollers to the other.
8. In a device of the class described, a plurality 30
of rollers, a supporting member extending lon
gitudinally of each roller, anti-friction casters
for supporting each of said members, a plate af
fording a guiding and supporting surface for said
casters, radius arms severally connected near one 35
end to said roller-supporting members respec
tively and severally having ?xed pivots near their
other ends to guide the several rollers in di?er
ent arcs upon said plate, the several pivotal axes
for said arms being spaced apart longitudinally 40
of the conveyer and means connecting each of
said arms to the adjacent arms for movement in
unison.
I
9. In a device of the class described, a plu
rality of rollers, a supporting member extending 45
longitudinally of each roller, anti-friction casters
for supporting each of said members, a plate af
fording a guiding and supporting surface for said
casters, radius arms severally connected to said
roller-supporting members respectively, extend 50
ing substantially at right angles thereto, and
pivoted to guide the several rollers in different
arcs upon said plate, said arms being of un
equal length and progressively longer from one
end of the group of rollers to the other and 55
means connecting each of said arms to the adja
cent arm.
10. In a spiral conveyer, a section of rollers
severally adapted to extend radially as a spiral
portion of said conveyer, ?xed means extend
ing beneath ‘and at one side of said spiral por
tion of the conveyer for guiding and supporting
the individual rollers of said section for move
ment laterally from said spiral, pairs of legs spac
ing the individual rollers of said section in par
allel relation to said guiding and supporting
member above the same and at progressively'de
creasing heights therefrom down the conveyer,
said legs being movable upon the top of said ?xed 70
guiding and supporting means and means con
necting said rollers together for lateral move
ment to divert loads from said conveyer.
'
11. In a spiral conveyer, a section of rollers
severally adapted to extend radially as a portion 75
2,105,922
’of said conveyer, aplane, horizontal plate ‘for movement of the rollers of said section to divert
supporting the individual rollers of said sec
tion for movement laterally from said spiral,
pairs of legs spacing the individual rollers of said
section in parallel relation to said plate and at
progressively decreasing heights therefrom down
the conveyer, said legs being movable upon and
across the :top surface vof said plate and means
connecting said rollers together for lateral move
10 ment to divert loads from said conveyer.
loads from said conveyor.
13. A roller conveyer switch comprising, a se~
ries of load supporting rollers, individual and sep
arate supports for said rollers respectively, an
arm secured to each of said supports, a ?xed pivot
for each of said arms, said arms being relatively
movable to different angular positions severally
about the axes of their pivots and means con
necting the several arms together for movement ,10
12. In a spiral conveyer, a section of rollers
in unison, said rollers being relatively movable,
severally adapted to extend radially as a spiral
portion of said conveyer, ?xed means extending
beneath and at one side of said spiral portion of
15 the conveyor for guiding and supporting the in
dividual rollers of said section for movement
laterally from said spiral, ‘pairs of legs spacing
the individual rollers of said section in parallel
relation above said guiding and supporting means
and at progressively decreasing heights therefrom
each under the guidance of one of said arms to
form different curves.
14. A roller clonveyer section comprising, a se
down the conveyer and arms severally connecting
said rollers together and to said guiding and
supporting means, said arms permitting lateral
only and being maintained thereby with its axis
ries of relatively movable, load supporting rollers
and arms of progressively increasing lengths sev
erally connected to the successive rollers of said
section and each having a ?xed pivot near a
?xed end of the section, each of said rollers being
movable under the guidance of one of said arms 4
radial to curves formed by the section.
‘
EDWARD H. MALTBY.
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